feat(openai): port /responses/compact account support flow (PR #1555)

将 vansour/sub2api#1555 的 OpenAI compact 能力建模手工移植到当前 main：账号
级 compact 状态/auto-force_on-force_off 模式、compact-only 模型映射、调度器
tier 分层（已支持 > 未知 > 已知不支持）、管理后台 compact 主动探测，以及对应
i18n/状态徽章。普通 /responses 流量行为不变，无数据库迁移。

frontend/src/components/account/CreateAccountModal.vue

@@ -2449,6 +2449,45 @@
         </div>
       </div>
 
+      <!-- OpenAI Compact 能力配置 -->
+      <div
+        v-if="form.platform === 'openai' && (accountCategory === 'oauth-based' || accountCategory === 'apikey')"
+        class="border-t border-gray-200 pt-4 dark:border-dark-600 space-y-4"
+      >
+        <div class="flex items-center justify-between">
+          <div>
+            <label class="input-label mb-0">{{ t('admin.accounts.openai.compactMode') }}</label>
+            <p class="mt-1 text-xs text-gray-500 dark:text-gray-400">
+              {{ t('admin.accounts.openai.compactModeDesc') }}
+            </p>
+          </div>
+          <div class="w-44">
+            <Select v-model="openAICompactMode" :options="openAICompactModeOptions" />
+          </div>
+        </div>
+        <div>
+          <label class="input-label">{{ t('admin.accounts.openai.compactModelMapping') }}</label>
+          <p class="input-hint">{{ t('admin.accounts.openai.compactModelMappingDesc') }}</p>
+          <div v-if="openAICompactModelMappings.length > 0" class="mb-3 space-y-2">
+            <div
+              v-for="(mapping, index) in openAICompactModelMappings"
+              :key="getOpenAICompactModelMappingKey(mapping)"
+              class="flex items-center gap-2"
+            >
+              <input v-model="mapping.from" type="text" class="input flex-1" :placeholder="t('admin.accounts.fromModel')" />
+              <span class="text-gray-400">→</span>
+              <input v-model="mapping.to" type="text" class="input flex-1" :placeholder="t('admin.accounts.toModel')" />
+              <button type="button" @click="removeOpenAICompactModelMapping(index)" class="text-red-500 hover:text-red-700">
+                <Icon name="trash" size="sm" />
+              </button>
+            </div>
+          </div>
+          <button type="button" @click="addOpenAICompactModelMapping" class="btn btn-secondary text-sm">
+            + {{ t('admin.accounts.addMapping') }}
+          </button>
+        </div>
+      </div>
+
       <div>
         <div class="flex items-center justify-between">
           <div>
@@ -2918,7 +2957,8 @@ import type {
   AccountPlatform,
   AccountType,
   CheckMixedChannelResponse,
-  CreateAccountRequest
+  CreateAccountRequest,
+  OpenAICompactMode
 } from '@/types'
 import BaseDialog from '@/components/common/BaseDialog.vue'
 import ConfirmDialog from '@/components/common/ConfirmDialog.vue'
@@ -3059,6 +3099,7 @@ const editWeeklyResetDay = ref<number | null>(null)
 const editWeeklyResetHour = ref<number | null>(null)
 const editResetTimezone = ref<string | null>(null)
 const modelMappings = ref<ModelMapping[]>([])
+const openAICompactModelMappings = ref<ModelMapping[]>([])
 const modelRestrictionMode = ref<'whitelist' | 'mapping'>('whitelist')
 const allowedModels = ref<string[]>([])
 const DEFAULT_POOL_MODE_RETRY_COUNT = 3
@@ -3071,6 +3112,7 @@ const customErrorCodeInput = ref<number | null>(null)
 const interceptWarmupRequests = ref(false)
 const autoPauseOnExpired = ref(true)
 const openaiPassthroughEnabled = ref(false)
+const openAICompactMode = ref<OpenAICompactMode>('auto')
 const openaiOAuthResponsesWebSocketV2Mode = ref<OpenAIWSMode>(OPENAI_WS_MODE_OFF)
 const openaiAPIKeyResponsesWebSocketV2Mode = ref<OpenAIWSMode>(OPENAI_WS_MODE_OFF)
 const codexCLIOnlyEnabled = ref(false)
@@ -3112,10 +3154,16 @@ const bedrockApiKeyValue = ref('')
 const tempUnschedEnabled = ref(false)
 const tempUnschedRules = ref<TempUnschedRuleForm[]>([])
 const getModelMappingKey = createStableObjectKeyResolver<ModelMapping>('create-model-mapping')
+const getOpenAICompactModelMappingKey = createStableObjectKeyResolver<ModelMapping>('create-openai-compact-model-mapping')
 const getAntigravityModelMappingKey = createStableObjectKeyResolver<ModelMapping>('create-antigravity-model-mapping')
 const getTempUnschedRuleKey = createStableObjectKeyResolver<TempUnschedRuleForm>('create-temp-unsched-rule')
 const geminiOAuthType = ref<'code_assist' | 'google_one' | 'ai_studio'>('google_one')
 const geminiAIStudioOAuthEnabled = ref(false)
+const openAICompactModeOptions = computed(() => [
+  { value: 'auto', label: t('admin.accounts.openai.compactModeAuto') },
+  { value: 'force_on', label: t('admin.accounts.openai.compactModeForceOn') },
+  { value: 'force_off', label: t('admin.accounts.openai.compactModeForceOff') }
+])
 
 function buildAntigravityExtra(): Record<string, unknown> | undefined {
   const extra: Record<string, unknown> = {}
@@ -3124,6 +3172,9 @@ function buildAntigravityExtra(): Record<string, unknown> | undefined {
   return Object.keys(extra).length > 0 ? extra : undefined
 }
 
+const buildOpenAICompactModelMapping = () =>
+  buildModelMappingObject('mapping', [], openAICompactModelMappings.value)
+
 const showMixedChannelWarning = ref(false)
 const mixedChannelWarningDetails = ref<{ groupName: string; currentPlatform: string; otherPlatform: string } | null>(
   null
@@ -3489,6 +3540,14 @@ const addModelMapping = () => {
   modelMappings.value.push({ from: '', to: '' })
 }
 
+const addOpenAICompactModelMapping = () => {
+  openAICompactModelMappings.value.push({ from: '', to: '' })
+}
+
+const removeOpenAICompactModelMapping = (index: number) => {
+  openAICompactModelMappings.value.splice(index, 1)
+}
+
 const removeModelMapping = (index: number) => {
   modelMappings.value.splice(index, 1)
 }
@@ -3781,6 +3840,7 @@ const resetForm = () => {
   editWeeklyResetHour.value = null
   editResetTimezone.value = null
   modelMappings.value = []
+  openAICompactModelMappings.value = []
   modelRestrictionMode.value = 'whitelist'
   allowedModels.value = [...claudeModels] // Default fill related models
 
@@ -3797,6 +3857,7 @@ const resetForm = () => {
   interceptWarmupRequests.value = false
   autoPauseOnExpired.value = true
   openaiPassthroughEnabled.value = false
+  openAICompactMode.value = 'auto'
   openaiOAuthResponsesWebSocketV2Mode.value = OPENAI_WS_MODE_OFF
   openaiAPIKeyResponsesWebSocketV2Mode.value = OPENAI_WS_MODE_OFF
   codexCLIOnlyEnabled.value = false
@@ -3874,6 +3935,11 @@ const buildOpenAIExtra = (base?: Record<string, unknown>): Record<string, unknow
   } else {
     delete extra.codex_cli_only
   }
+  if (openAICompactMode.value !== 'auto') {
+    extra.openai_compact_mode = openAICompactMode.value
+  } else {
+    delete extra.openai_compact_mode
+  }
 
   return Object.keys(extra).length > 0 ? extra : undefined
 }
@@ -4086,6 +4152,12 @@ const handleSubmit = async () => {
       credentials.model_mapping = modelMapping
     }
   }
+  if (form.platform === 'openai') {
+    const compactModelMapping = buildOpenAICompactModelMapping()
+    if (compactModelMapping) {
+      credentials.compact_model_mapping = compactModelMapping
+    }
+  }
 
   // Add pool mode if enabled
   if (poolModeEnabled.value) {
@@ -4198,6 +4270,14 @@ const createAccountAndFinish = async (
       finalExtra = quotaExtra
     }
   }
+  if (platform === 'openai') {
+    const compactModelMapping = buildOpenAICompactModelMapping()
+    if (compactModelMapping) {
+      credentials.compact_model_mapping = compactModelMapping
+    } else {
+      delete credentials.compact_model_mapping
+    }
+  }
   await doCreateAccount({
     name: form.name,
     notes: form.notes,
@@ -4252,6 +4332,12 @@ const handleOpenAIExchange = async (authCode: string) => {
         credentials.model_mapping = modelMapping
       }
     }
+    if (shouldCreateOpenAI) {
+      const compactModelMapping = buildOpenAICompactModelMapping()
+      if (compactModelMapping) {
+        credentials.compact_model_mapping = compactModelMapping
+      }
+    }
 
     // 应用临时不可调度配置
     if (!applyTempUnschedConfig(credentials)) {
@@ -4344,6 +4430,12 @@ const handleOpenAIBatchRT = async (refreshTokenInput: string, clientId?: string)
             credentials.model_mapping = modelMapping
           }
         }
+        if (shouldCreateOpenAI) {
+          const compactModelMapping = buildOpenAICompactModelMapping()
+          if (compactModelMapping) {
+            credentials.compact_model_mapping = compactModelMapping
+          }
+        }
 
         // Generate account name; fallback to email if name is empty (ent schema requires NotEmpty)
         const baseName = form.name || tokenInfo.email || 'OpenAI OAuth Account'